And if you read the previous mentioned opinion, note the intro section: "The Gun Control Act of 1968 (GCA), 18 U. S. C. §921 et seq., establishes a detailed federal scheme governing the distribution of firearms. It prohibits firearms dealers from transferring handguns to any person under 21, not resident in the dealer's State, or prohibited by state or local law from purchasing or possessing firearms..." Very interesting capitalization of the word "state", is it not? Read FRCP 54(c) that tells you an "Act of Congress" is of municipal jurisdictional effect, not public law. So we do not disagree that there is such a thing as a federal "State", but I'm not in one.